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  Java连接GBase8s执行Statement和PreparedStatement基本套路.md
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  <h3 id="基本套路"><a href="#基本套路" class="headerlink" title="基本套路"></a>基本套路</h3><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> weidb;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> java.sql.Connection;</span><br><span class="line"><span class="keyword">import</span> java.sql.DriverManager;</span><br><span class="line"><span class="keyword">import</span> java.sql.ResultSet;</span><br><span class="line"><span class="keyword">import</span> java.sql.Statement;</span><br><span class="line"><span class="keyword">import</span> java.sql.PreparedStatement;</span><br><span class="line"></span><br><span class="line"><span class="keyword">public</span> <span class="keyword">class</span> <span class="title class_">DbUtil</span> &#123;</span><br><span class="line">    <span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">final</span> <span class="type">String</span> <span class="variable">DRIVER</span> <span class="operator">=</span> <span class="string">&quot;com.gbasedbt.jdbc.Driver&quot;</span>;</span><br><span class="line">    <span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">final</span> <span class="type">String</span> <span class="variable">URL</span> <span class="operator">=</span> <span class="string">&quot;jdbc:gbasedbt-sqli://1.1.1.7:60111/appdb:GBASEDBTSERVER=tpcc;CLIENT_LOCALE=zh_cn.utf8;DB_LOCALE=zh_cn.utf8;LOGINTIMEOUT=1000;IFX_LOCK_MODE_WAIT=60;APPENDISAM=true;UPPER_CASE=y;DBDATE=Y4MD&quot;</span>;</span><br><span class="line">    <span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">final</span> <span class="type">String</span> <span class="variable">USER</span> <span class="operator">=</span> <span class="string">&quot;gbasedbt&quot;</span>;</span><br><span class="line">    <span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">final</span> <span class="type">String</span> <span class="variable">PASSWORD</span> <span class="operator">=</span> <span class="string">&quot;GBase123!&quot;</span>;</span><br><span class="line"></span><br><span class="line">    <span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title function_">main</span><span class="params">(String[] args)</span> <span class="keyword">throws</span> Exception &#123;</span><br><span class="line">        Class.forName(DRIVER);</span><br><span class="line">        <span class="type">Connection</span> <span class="variable">conn</span> <span class="operator">=</span> DriverManager.getConnection(URL,USER,PASSWORD);</span><br><span class="line">        <span class="type">String</span> <span class="variable">sql1</span> <span class="operator">=</span> <span class="string">&quot;select * from t2 where id &gt; 2&quot;</span>;</span><br><span class="line">        <span class="type">String</span> <span class="variable">sql2</span> <span class="operator">=</span> <span class="string">&quot;select * from t2 where id &gt; ?&quot;</span>;</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">        <span class="comment">// 方式1：执行Statement语句</span></span><br><span class="line">        <span class="type">Statement</span> <span class="variable">stmt</span> <span class="operator">=</span> conn.createStatement();</span><br><span class="line">        <span class="type">ResultSet</span> <span class="variable">rs</span> <span class="operator">=</span> stmt.executeQuery(sql1);</span><br><span class="line">        <span class="keyword">while</span> (rs.next())&#123;</span><br><span class="line">            System.out.println(<span class="string">&quot;Statement: &quot;</span>+rs.getInt(<span class="string">&quot;id&quot;</span>)+<span class="string">&quot;名称：&quot;</span>+rs.getString(<span class="string">&quot;name&quot;</span>));</span><br><span class="line">        &#125;</span><br><span class="line"></span><br><span class="line">        <span class="comment">// 方式2：执行PreparedStatement 语句</span></span><br><span class="line">        <span class="type">PreparedStatement</span> <span class="variable">ps</span> <span class="operator">=</span> conn.prepareStatement(sql2);</span><br><span class="line">        ps.setInt(<span class="number">1</span>,<span class="number">2</span>);</span><br><span class="line">        <span class="type">ResultSet</span> <span class="variable">rs1</span> <span class="operator">=</span> ps.executeQuery();</span><br><span class="line">        <span class="keyword">while</span> (rs1.next())&#123;</span><br><span class="line">            System.out.println(<span class="string">&quot;PreparedStatement: &quot;</span>+rs1.getInt(<span class="string">&quot;id&quot;</span>)+<span class="string">&quot;名称：&quot;</span>+rs1.getString(<span class="string">&quot;name&quot;</span>));</span><br><span class="line">        &#125;</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"></span><br></pre></td></tr></table></figure>

<h3 id="批量提交"><a href="#批量提交" class="headerlink" title="批量提交"></a>批量提交</h3><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> weidb;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> java.sql.Connection;</span><br><span class="line"><span class="keyword">import</span> java.sql.PreparedStatement;</span><br><span class="line"></span><br><span class="line"><span class="keyword">public</span> <span class="keyword">class</span> <span class="title class_">BatchCommitSqlDemo</span> &#123;</span><br><span class="line">    <span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title function_">main</span><span class="params">(String[] args)</span> <span class="keyword">throws</span> Exception &#123;</span><br><span class="line">        <span class="type">Connection</span> <span class="variable">conn</span> <span class="operator">=</span> DbUtil.getConnection();</span><br><span class="line">        <span class="type">String</span> <span class="variable">sql</span> <span class="operator">=</span> <span class="string">&quot;update goddess set user_name = ? where id = ?&quot;</span>;</span><br><span class="line">        <span class="type">PreparedStatement</span> <span class="variable">ps</span> <span class="operator">=</span> conn.prepareStatement(sql);</span><br><span class="line">        conn.setAutoCommit(<span class="literal">false</span>);</span><br><span class="line">        <span class="keyword">for</span> (<span class="type">int</span> i=<span class="number">1</span>;i&lt;=<span class="number">100</span>;i++)&#123;</span><br><span class="line">            <span class="type">String</span> <span class="variable">name</span> <span class="operator">=</span> String.valueOf(getRandomChar())+getRandomChar();</span><br><span class="line">            ps.setString(<span class="number">1</span>,name);</span><br><span class="line">            ps.setInt(<span class="number">2</span>,i);</span><br><span class="line">            ps.addBatch();</span><br><span class="line">        &#125;</span><br><span class="line">        <span class="type">int</span>[] counts = ps.executeBatch();</span><br><span class="line">        conn.commit();</span><br><span class="line">        <span class="keyword">for</span> (<span class="type">int</span> i=<span class="number">1</span>;i&lt;=<span class="number">100</span>;i++)&#123;</span><br><span class="line">            System.out.println(<span class="string">&quot;语句 &quot;</span>+i+<span class="string">&quot; : 修改了&quot;</span>+ counts[i-<span class="number">1</span>]+<span class="string">&quot;条数据。&quot;</span>);</span><br><span class="line">        &#125;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="keyword">public</span> <span class="keyword">static</span> <span class="type">char</span> <span class="title function_">getRandomChar</span><span class="params">()</span> &#123;</span><br><span class="line">        <span class="keyword">return</span> (<span class="type">char</span>) (<span class="number">0x4e00</span> + (<span class="type">int</span>) (Math.random() * (<span class="number">0x9fa5</span> - <span class="number">0x4e00</span> + <span class="number">1</span>)));</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"></span><br><span class="line"></span><br><span class="line"></span><br></pre></td></tr></table></figure>

 
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